Temperature scanner

ABSTRACT

A temperature scanner with an extensible boom is mounted upon a mobile carriage for extending the scanner over a hot glass ribbon; a rotatable mirror is mounted near the end of the boom for conveying radiation from the glass surface to a temperaturerecording device aside from the glass ribbon.

United States Patent [56] References Cited UNITED STATES PATENTS 2,008,793 7/1935 Nichols 73/355 X 2,601,508 6/1952 Fastie 73/355 X 2,709,367 5/1955 Bohnet. 73/355 3.501.380 3/!970 Perch 73/355 X Primary Examiner- Louis R. Prince Assistant Examiner-Frederick Shoon Aflorney-Chisholm and Spencer ABSTRACT: A temperature scanner with an extensible booni is mounted upon a mobile carriage for extending the scanner over a hot glass ribbon; a rotatable mirror is mounted near the end of the boom for conveying radiation from the glass surface to a temperature-recording device aside from the glass ribbon.

@135 l cal PATENTEUAUBZMHYI 3.600847 sum 1 OF 2 INVENTUR AUOYSIUS W. FARABAU H WWW QZN ATTORNEB TEMPERATURE SCANNER SUMMARY OF THE INVENTION This invention is a temperature-scanning device for recording the temperature of a glass ribbon in the forming section of a glass machine or lehr. The scanner comprises a boom for extending through a side opening in the lehr, a bottom surface of which boom at its hot end" has a sapphire window which goes over the glass, to receive radiant energy from the molten glass and then reflect it across to the opposite end of the boom or tube. The cold end, outside the lehr, contains a pyrometer focused on the molten glass, using a system of mirrors. The boom is rectangular and hollow in cross-sectional shape to provide an enclosed path for the transmission of the radiation from the glass surface.

The tube is advanced through the opening of the lehr by extending on rolls, mounted on the carriage and driven by a constant-speed motor. The carriage may also support associated detection instrumentation, chart recorders, etc., to provide a permanent record of the temperatures measured.

DESCRIPTION OF THE DRAWING FIG. 1 is a schematic side drawing of the temperature scanner showing the boom and mobile carriage or cart;

FIG. 2 is a schematic drawing of the temperature scanner inserted over a ribbon of glass in reading position.

DESCRIPTION OF THE PREFERRED EMBODlMENTS The boom assembly and carriage is indicated by the number 10. The boom is indicated as 11. A scanner assembly 13 is movably mounted on the extensible boom section 14.

FIG. 2 is a schematic cutaway view of a forming lehr 16. The boom [4 is protruding through the lehr wall 17. A mirror 18 is mounted within the boom, and a sapphire window 19 is mounted in the bottom of the boom.

OPERATION The boom 11 is inserted through a suitable opening or side access door in the lehr wall 17. The boom 11 is constructed of stainless steel to withstand the heat of the lehr. The boom has a retracted length 5 to 8 feet, with an extended length of 28 to 30 feet. Within the internal cross section thereof, there is room for the installation of cooling lines, etc., within the boom. The extension of the boom is made possible by an extending cable driven by chain 20 which is powered by a drive motor 21. The chain drive runs over a plurality of pulleys 22 and is extended in a direction into and over the ribbon of glass G at a constant rate of speed as provided by the drive motor. When in position, the radiation from the hot glass is admitted to the sapphire window 19 and reflected by the mirror 18 across the boom 11 and then received by a recording device, not shown, where either a temporary or permanent record may be made of the temperature recording. The mirror 18 may be moved or rotated so as to scan an area of the molten glass G beneath the boom without moving the boom mechanism itself.

I claim:

1. A temperature-scanning apparatus comprising a mobile carriage, an extensible boom retractably mounted on said carriage, a radiation-monitoring device mounted on the carriage, and a movable mirror mounted at the hot end of said boom, said boom having in a bottom portion of its hot end an opening for exposing said mirror to the radiations from a substrate.

2. A temperature-scanning apparatus comprising a mobile carriage, an extensible boom retractably mounted on said car riage, a radiation-monitoring device mounted on the carriage, a movable mirror mounted at an end of the boom, said boom having in a bottom portion of its hot end an opening for exposing said mirror to the radiations from a substrate, and a sapphirc window covering said opening, 

1. A temperature-scanning apparatus comprising a mobile carriage, an extensible boom retractably mounted on said carriage, a radiation-monitoring device mounted on the carriage, and a movable mirror mounted at the hot end of said boom, said boom having in a bottom portion of its hot end an opening for exposing said mirRor to the radiations from a substrate.
 2. A temperature-scanning apparatus comprising a mobile carriage, an extensible boom retractably mounted on said carriage, a radiation-monitoring device mounted on the carriage, a movable mirror mounted at an end of the boom, said boom having in a bottom portion of its hot end an opening for exposing said mirror to the radiations from a substrate, and a sapphire window covering said opening. 